Thank you all for your comments, appreciated. Bob, 'Quadrophenia' was a movie based in the mid 60's about the hostile relationship between the Mods (fashionably dressed scooter riders) & the Rockers (leather clad motorcycle riders). For a couple of years the two groups fought it out in popular coastal resorts & brought mayhem to these areas. In effect it was a milder version of the the Hells Angels visitation on Hollister in your country. There's a lot more to it than that but that's the basics.